RACF® supports the following network protocols for an RRSF network:

• TCP/IP
• APPC/MVS and VTAM®

You can use one or both of these protocols in an RRSF network. IPv4 and IPv6 are supported for TCP/IP. See z/OS Communications Server: IPv6 Network and Application Design Guide for more information about the IPv6 protocol in z/OS® Communication Server.